20pcs N50 12x3mm Countersink Ring Magnets 4mm Hole Rare Earth Neodymium Magnet

Description: 20pcs N50 Strong Countersunk Ring Magnets 12 x 3mm Hole 4mm Rare Earth Neodymium Specification: Shape : Round Material : NdFeB magnetic materials Product Size : 12*3mm Hole Diameter: 4mm Grade : N50 Quantity :20pcs Ages:7+ ages, both for kids and adults. Features: Super strong Rare-Earth magnets - once they get stuck with each other, they are hard to break apart. Can also be used to extend protected lithium batteries with recessed contact points. Electrically conductive (making them suitable to extend recessed batteries). Perfect for sticking notes on fridge doors. Great for do-it-yourself projects. Package Included: 20x Countersunk Magnets More Details: